Brussels, 28/09/2012 (Agence Europe) - You can wait 75 years for a glimpse of Halley's Comet, but did you know you can make one yourself in just a few minutes? All it takes is a mixture of day-old dry ice, water, mud and a few other components - and you have a comet of your very own. How cosmic is that? Learning how to make a comet with space scientists in London, creating a cloud with meteorologists in Bolzano, Italy, and exploring the San Antonio volcano with geologists in the Canary...